Clevis



Patented Mar. 18, 15924.

Unirse erariale VERNER T. STOCKTON, 0F OKEMAH, OKLAHOMA.

cLEvIs.

Application filedv December 2, Y1921. Serial No. 519,445.

To all whom t may concern.'

Be it known that I, VERNE-R T. S'roCK'roN, a citizen of the United States, residing at Okemah, in the county of Okfuskee and State of Oklahoma, have invented certain new and useful improvements in Clevises, of which the following is a specification.

This invention has reference to clevises and particularly to a locking device for the clevis pin.

An object of the invention is to provide a clevis having a self locking clevis pin that will automatically bind itself against displacement, thereby avoiding the loss'of a pin while the clevis is in use.

An additional object is to provide an improved type of clevis in whichthe 'pin is automatically and tensionably locked securely in place although readily removable when desired; the invention being applicable to clevises of various sorts.

Various other objects and advantages of the invention will become apparent during the continuance of the following description.

Figure 1 is a side elevation view of the clevis, partly in section disclosing the method of locking the pin.

Figure 2 is a top plan view thereof.

Figure 3 is a transverse cross section taken on line 3-3 of Figure 1, and,

Figure 4 is a detailed, in perspective, view of the locking pin.

The clevis, indicated in the drawings at 10, is preferably U-shaped and is tapered so that the arms widen out toward their free end. The clevis is thus strongest where the strain is heaviest.

Each arm is provided with an opening 11; the opening being in alignment to receive the shank 12 of the clevis pin. At the free end of one of the clevis arms and on the outer face thereof is a locking lip 13 having its under face inclined with respect to the face of the arm, as indicated at 14, thus providing a wedge-shaped opening into which the tongue 15 of the clevis pin is adapted to be inserted. Locking lip 13 may be an integral part of the clevis and may be formed by bending back the outer free end of a clevis arm as indicated in Figure 1 of the drawing. This lip extends back to a point directly even with the edge of hole 11 as will be apparent from Figure 2. Formed in the lip-bearing arm of the clevis is an elongated cavity or depression 16 having sloping sides'17. Adapted for engagementwith cavity 16 is the extension 18 carried by the head 19 of the clevis 10. As shown in detaill in Figure 1l, the head ofthe pin is projected from opposite ends and provided with a wedge-shaped tongue 15 andthe extension 18. The extension is provided with :a smooth faced knob on its underside adapted to slide easily over the sloping walls of the cavity 16 and to t in the latter as shown in Figure 1. The head ofthe pin is weakened at a point intermediate lthe knobbed face of the extension and atongued-end of the head, as indicated at 20, to provide for a slight yielding move- 'ment of the extension.

When securing the pin to the clevis, the shank 12 is inserted through openings 11, the head of the pin being disposed at right an# gles to the clevis arm as indicated in dotted line in Figure 2. After the shank is engaged with both of the clevis arms, the head of the pin is swung aroundruntil wedgetongue 15 with its inclined face engages under locking lip 13. At the same time, extensions 18 may be elevated slightly and against its own tension to clear the sides of the clevis arms so that when released, it will drop down into cavity 16. The eXtension is normally tensioned to exert a downward pull and hence it will fit snugly in the cavity of the clevis arm and hold the pin firmly in place. 'In order to release the pin, tongue 15 must be forced by some convenient tool from under locking lip 13 `untilit is at right angles to the lip, the locking extension 18 riding easily and upwardly over the inclined walls'of the cavity as the tongue is driven to its releasing position. It will thus be seen that the tongue and extensionsY serve automatically to lock the pin to the clevis and to prevent casual displacement of the pin while the clevis is in use.

From the foregoing it is believed that the advantages and novel features of the invention will be readily understood and therefore further detailed description is deemed shank penetrating the clevis between the de.

provide locking lip having 'its lterminal edge aligned With the edge of the opening and arranged at a slant to the arm to provide a Wedge-shaped recess said arrn also having a depression on the opposite -sidelof the opening, a clevis pin having its sha-nl; insertable through thera'ligned openings .of the arms and a head having oppositeends extended providing respectively a 'locking tongue engageable under the locking lip and an extension engageable in the depression,

saidhead beingl weakened at ra pointv between the tongue and extension to make 'the latter ela'stic'z'.V

8. A clevis comprising a U-shaped meinber tapered so that' the arms Widen out towards their respective free ends, and a clevis pin consisting of a shank and an integrally formed head thereon presenting an elon- ,ga-ted smooth-faced tensionable knob on `one side of the shank and a relatively stili nonyielding tongue on the opposite side, the said shank of the pin being insertable through aligned openings in the arms of the clevis with the head of thepin initially disposed at right angles to the clevis arms, one of the said arins having the portion beyond the opening bent back to a point directly even with the edge of the opening to provide a locking lip and having the portion adjacent the opposite side of the opening formed with a cavity having sloping Walls, the said lipand cavity of the said arm serving to respectively engage and seat the said tongueand knob portionsV of the said head when the latter is turned to the said arm.` Y

ln testimony whereof I aiiix iny signature.

. VERNER T. sTo'oK'roN.

rest longitudinally Valongv 

